Journal
INVENTIONES MATHEMATICAE
Volume 141, Issue 1, Pages 55-147Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/PL00005790
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We study the global analytic properties of the solutions of a particular family of Painleve VI equations with the parameters beta = gamma = 0, delta = 1/2 and 2 alpha = (2 mu-1)(2) with arbitrary mu, 2 mu is not an element of Z. We introduce a class of solutions having critical behaviour of algebraic type, and completely compute the structure of the analytic continuation of these solutions in terms of an auxiliary reflection group in the three dimensional space. The analytic continuation is given in terms of an action of the braid group on the triples of generators of the reflection group. We show that the finite orbits of this action correspond to the algebraic solutions of our Painleve VI equation and use this result to classify all of them. We prove that the algebraic solutions of our Painleve VI equation are in one-to-one correspondence with the regular polyhedra or star-polyhedra in the three dimensional space.
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